DIY Audio Projects Forum

Welcome to the DIY Audio Projects Message Forum. Use these forums to discuss Hi-Fi audio and to share your DIY Audio Projects. Registration is free and required to post messages and view the file attachments. Registration will only take a minute and registered users do not see any advertisements. After you have completed the online registration process, check your email (including spam/junk folder) for the verification email to activate your account. New members are under moderation - so your posts will not be visible until approved by a moderator. See the Read Me 1st, Forum RULES and Forum FAQ to get started on the forum.

Just added to the site is a new Solid State project. Dan has once again put together a great looking Class-A following a Jean Hiraga circuit the "Super Class-A 30W" which was featured in the French audio magazine "L'Audiophile" a while back. Using Toshiba 2SA1943 and 2SC5200 transistors with a higher rail voltage, Dan measured 58W of Class-A power.

We have added a new project to the site. Another chipamp - a small one this time built by Thomas in Germany. The project used the small STMicroelectronics TDA2050V chip which can produce about 25W into 8 ohms with ~24V rails.

This project by Bruce is for a relatively simple but high performance RIAA phono preamplifier that can handle both moving magnet (MM) and low output moving coil (LOMC) cartridges. The preamplifier circuit uses a Burr-Brown OPA2134 op-amp and a passive RIAA filter. The power supply makes clever use of a Meanwell DCW03A-12 DC to DC converter to produce a regulated symmetrical power supply. The RIAA preamplifier can be built for about $100US including a modest enclosure. Bruce reports that this is a "surprisingly nice sounding preamplifier".

The Gobo Stereo Audio Amplifier Kit is a class-AB chip amp kit based around the LM1875 IC. This is a complete amp kit that includes all the necessary parts and enclosure to build a stereo amplifier. The LM1875 amp kit comes with audio-grade capacitors and toroidal transformer. The Gobo amplifier kit is easy to build, looks and sounds great. The amplifier kit is well suited to first time amp builders.

This is the Boozhound Laboratories JFET Moving-Coil (MC) Pre-Preamp Kit. The MC pre-preamp kit consists of a PCB, standoffs, the circuit parts and building instructions. The builder will need to provide a 12-24VDC power supply, an enclosure and miscellaneous hardware like connectors and switches. The kit uses 2SK170 JFET transistors and comes with fabulous vintage Russian military paper-in-oil (PIO) capacitors. Mark uses 9V batteries for the power supply and is very pleased with the results.

Who is online

Users browsing this forum: No registered users and 1 guest

You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum